Dresden 2017 – wissenschaftliches Programm
HL 58.8: Vortrag
Mittwoch, 22. März 2017, 17:15–17:30, POT 151
Coherent Control of a Photonic Crystal Microresonator with Electric Readout — Wadim Quiring1, •Björn Jonas1, Jens Förstner1, Ashish K. Rai2, Dirk Reuter1, Andreas D. Wieck2, and Artur Zrenner1 — 1Center for Optoelectronics and Photonics Paderborn (CeOPP), Universität Paderborn, Paderborn, Germany — 2Ruhr-Universität Bochum, Bochum, Germany
We present coherent two pulse experiments on GaAs photonic crystal microresonators. The MBE-grown structures have a membrane, which is designed as a n-i layer with an embedded InGaAs quantum well. Metallic contacts with 50 nm dimensions have been processed by e-beam lithography in order to realize a local Schottky gate on the central part of the microresonator. The resulting structures allow for photocurrent detection of cavity excitations at Q-factors around 5000.  Resonant and detuned two-pulse ps-laser excitation is used for the coherent excitation and manipulation of the cavity, which is monitored by photocurrent detection via the built-in quantum well. We are able to measure the amplitude and phase of the cavity excitation as a function of the detuning. Our experimental findings are well described by an analytical theory, in which the cavity is treated as a dissipative two-level system. We further show, that our phase sensitive experiments can also be successfully performed at room temperature, which makes real-world applications of cavity based phase control and frequency discrimination feasible.
 W. Quiring et al., Appl. Phys. Lett. 107, 041113 (2015)
 W. Quiring et al., Optics Express 24, 20672 (2016)